run_tests: remove output dir before running
run_tests: remove output dir before running

jussimalinen/SSHLibrary,garybehrend/robotframework-sshlibrary,jussimalinen/SSHLibrary,haeygen/SSHLibrary,garybehrend/robotframework-sshlibrary,junousia/SSHLibrary,haeygen/SSHLibrary,junousia/SSHLibrary